| 11669500 |
System and method for distributing data using block chain |
Dong Hwan Shin, Hong-Gu Kim, Hong Joon Ha, Lae Wook Lee, Hwa Min Yu |
2023-06-06 |
| 11469879 |
Text watermarking method and apparatus for hiding information into text documents |
— |
2022-10-11 |
| 9830433 |
Method, system and device for enhancing business information security |
Joo Won CHO, Yusep Rosmansyah |
2017-11-28 |
| 9818233 |
Method and apparatus for automatically splitting object and method, apparatus, and system for registering file |
Hyoung Jun Kim, Jae Hong Kim, Kyu Sun Cho |
2017-11-14 |
| 9819494 |
Digital signature service system based on hash function and method thereof |
Ho-il Ryu, Hae-il Jung |
2017-11-14 |
| 9742783 |
Method for sending contents including tracking information and apparatus thereof, and method for receiving content including tracking information and apparatus thereof |
Chang-Won Kim, Jeong Soo Kim |
2017-08-22 |
| 9491147 |
DRM content stream transmission apparatus, method, and transmission and reception system |
Chang-Won Kim, Jeong Soo Kim, Gyoung Soon Kim |
2016-11-08 |
| 8677345 |
System for creating virtual application, method for installing virtual application, method for calling native API and method for executing virtual application |
Dongha Shin, Sung Wook JUNG, Jiyeon Kim, Muhammad Ali Malik |
2014-03-18 |
| 8610709 |
Method and apparatus for watermarking of 3D mesh model |
Jizhe Cui, Jong-Weon Kim |
2013-12-17 |
| 7707422 |
Method for embedding watermark into an image and digital video recorder using said method |
Dong Hwan Shin, Kyong-Soon Kim, Won-Ha Lee |
2010-04-27 |
| 7594274 |
Method of authenticating an application for personal digital assistant using a unique ID based on a personal computer and system using thereof |
Jong Won Kim, Byung-Keun Jeon |
2009-09-22 |
| 7457957 |
Apparatus and method for issuing and authenticating securities, etc. using digital watermarking |
Jong Won Kim |
2008-11-25 |
| 7447329 |
Apparatus and method for producing a document verifiable for its forgery or alteration, and apparatus and method for authenticating the document |
Jong Won Kim |
2008-11-04 |
| 7395432 |
Method of embedding/detecting digital watermark and apparatus for using thereof |
Jung-Soo Lee |
2008-07-01 |
| 7386729 |
Method of inserting/detecting digital watermark and apparatus for using thereof |
Jung-Soo Lee, Han Ho Lee |
2008-06-10 |
| 7280669 |
Digital image watermarking apparatus and method |
Jung Su Lee |
2007-10-09 |
| 7140043 |
Watermark embedding and detecting method by quantization of a characteristic value of a signal |
Won-Ha Lee, Seung Won SHIN |
2006-11-21 |
| 6975733 |
Watermarking of digital images using wavelet and discrete cosine transforms |
Jong Won Kim, Jung Suck Cho, Han Ho Lee |
2005-12-13 |
| 6940995 |
Method for embedding and extracting text into/from electronic documents |
Gi Chul Choi |
2005-09-06 |
| 6839673 |
Digital watermarking method and apparatus for audio data |
Jung Seok Cho, Jong-Weon Kim |
2005-01-04 |